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2594 Acamas (1978 TB)
Classification: Jupiter Trojan          SPK-ID: 2002594
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08541653605871728 5.0134e-08  
a 5.059372875043366 9.342e-08 au
q 4.627218769427728 2.8363e-07 au
i 5.535423644933593 6.2117e-06 deg
node 356.6918982800809 5.715e-05 deg
peri 279.467760927494 7.7829e-05 deg
M 276.4949217204276 5.9199e-05 deg
tp 2459564.670513446397
(2021-Dec-16.17051345)
0.00069406 TDB
period 4156.650014489157
11.38
0.00011513
3.152e-07
d
yr
n .08660820582563365 2.3988e-09 deg/d
Q 5.491526980659003 1.014e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1063  
   data-arc span      23967 days (65.62 yr)  
   first obs. used      1953-09-17  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54149  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 18:20:02  

Additional Information
 Earth MOID = 3.61619 au 
 Jupiter MOID = .0839411 au 
 T_jup = 2.984 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8   n/a MPO319116  
diameter diameter 25.874 km 0.594 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 25.954 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.060   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

2594 Acamas (1978 TB)          Discovered 1978-Oct-04 by Kowal, C. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1978 TB = 1977 RR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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